Reliability of Transfer Length Estimation from Strand End Slip

This paper reports on an experimental program on 12 series of concrete specimens with different embedment lengths to determine the distance required to develop the effective stress in the prestressing strand (i.e., transfer length). Transfer length test results of seven-wire strands on twelve different concrete mixtures were analyzed. The study used a testing technique based on the analysis of bond behavior by means of measuring the force supported by the tendon. The specimens had been instrumented with slip measurement devices at each end of the specimen, and a sequence of slip values at each end of the specimen after release versus the embedment length has been analyzed. The expressions relating the transfer length to the tendon end slip are presented. Two criteria to determine the transfer length from the slip sequences at both ends of the specimens have been analyzed. Results verify the feasibility of applying the proposed test method to determine the transfer length of prestressing stands, even in concretes with low compressive strength. A value of Guyon’s factor for tendon stress distribution shape also has been obtained.

  • Availability:
  • Authors:
    • Marti-Vargas, Jose R
    • Arbelaez, Cesar A
    • Serna-Ros, Pedro
    • Castro-Bugallo, Carmen
  • Publication Date: 2007-7

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01055218
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 11 2007 2:57PM